Short of transplanting a new tranny, what options are there available to change the final gear ratio of the getreg? If a transplant is the only option, what tranny would be my best option that would give me a final gear ratio of 3:8ish to 4:10 range.
This one comes up every few months. According to Rodney, there are no options for changing any of the Getrag's gears. You could try using the Quad4 Getrag which has a shorter final ratio, but it would require making an adapter plate because the bellhousing bolt pattern is different.
Originally posted by crazyd: You could try using the Quad4 Getrag which has a shorter final ratio, but it would require making an adapter plate because the bellhousing bolt pattern is different.
Although I haven't seen a Q4 Getrag, I suspect you could just switch the case half with the bellhousing in it. All the imporant bits stay in the other half when you split the cases.
Well, here is what I know. The getreg that you guys talking about on the Quad 4, was only put on cars with a sport performance package (like the Cutlass Calais Quad 442 with the W4L performance package). Its gearing is as follows:
Ideally the M19 found in a few 1984 Fieros that had the 4:10 final gearing would work, but its a 4 speed and I kind of wanted to stick with a 5. I have a M17 laying around, but its gearing is such that it ends up being worse then the getreg M282.
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05:12 PM
mrfiero Member
Posts: 8996 From: Colorful Colorado Registered: Mar 99
Originally posted by 88-DOHC: Well, here is what I know. The getreg that you guys talking about on the Quad 4, was only put on cars with a sport performance package (like the Cutlass Calais Quad 442 with the W4L performance package).
Also found on '93-'94 Olds Achieva SCX's (with the W41 option). I found one of these in the junkyard, but they want to sell teh car as a whole, not part it out. I had thought about using this tranny in a Fiero....it would sure liven up a stock GT!
quote
Ideally the M19 found in a few 1984 Fieros that had the 4:10 final gearing would work, but its a 4 speed and I kind of wanted to stick with a 5. I have a M17 laying around, but its gearing is such that it ends up being worse then the getreg M282.
Actually, the M17 4-sp. has a 3.65 final drive ratio, which is slightly better than the Getrag (although only 4 speeds).
I would keep looking for one of those 3.94 Getrags and swap cases like Doug Chase suggests. You may be looking for awhile, but you'd wind up with a nicely geared Fiero in the end.
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06:19 PM
Doug Chase Member
Posts: 1487 From: Seattle area, Washington State, USA Registered: Sep 2001
Originally posted by mrfiero: Also found on '93-'94 Olds Achieva SCX's (with the W41 option). I found one of these in the junkyard, but they want to sell teh car as a whole, not part it out.
Buy the car!!
The Getrag in that one also has a limited slip. That's a very, very rare item.
That car also has the highest stock output Quad 4 at 190hp.
Pull the axles. If you can look all the way through, then it's a Torsen, if the cross-bar obstructs your seeing all the way through, then it's a conventional open diff.
Be aware that you can't just bolt a normal Getrag case half onto the Q4 trans. It will bolt on (AFAIK), but you MUST reset the preload on the differential side bearings. This is done with select fit shims and either a LOT of work or a $700 tool set.
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07:53 PM
88-DOHC Member
Posts: 442 From: San Jose, CA, USA Registered: Dec 2001
I understood that the 1984 came with 2 different 4 speeds, the M19 and the MY8. I have seen the M19 referenced as a 4.10:1, and the MY8 referenced as 3.32:1. If those are wrong, well.. then.. I guess I learned something new.
Ok, I guess I will search for a W41 (wasn't sure if it was W41 or W4L, as my info is rather blury in that respect). Anyway, is there an easy way to tell wether this option is on a car or not? Then again, if the bell housing bolt pattern is different, that is another issue.
As for the M17, the final is 3.65:1 which technically is slightly better then the M282 getreg, but the gears themselves are so tall in comparison it actually makes things worse. For instance, here is the calculated top speeds in each gear @ 7000RPM.
Originally posted by 88-DOHC: I understood that the 1984 came with 2 different 4 speeds, the M17 and the MY8. I have seen the M17 referenced as a 4.10:1, and the MY8 referenced as 3.32:1. If those are wrong, well.. then.. I guess I learned something new.
The M17 was available on '85-'86 V-6 Fieros......you're thinking of the M19, which has the 4.10 gears.
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08:53 PM
PFF
System Bot
88-DOHC Member
Posts: 442 From: San Jose, CA, USA Registered: Dec 2001
so how can you tell which tranny it is, is there a stamp on the tranny somewhere? id like to know if i have the m19 at all. and on top of that, which models came with it, or was it just an option to all that year?
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07:01 PM
Will Member
Posts: 14226 From: Where you least expect me Registered: Jun 2000
Originally posted by Jimmy: The M284 looks like it would work well for my V8 Fiero. I like the W41 but the fifth gear would kill me in RPMs/Gas milage on the freeway.
On my stock Getrag tranny second gear doesn't feel right. First feels good, and so does third, but second doesn't feel "low" enough.
Is it possible to mismatch gears if one were to rebuild a tranny?
Jim 87 GT T-TOP V8 87 GT
The 284 was only used with the 3.4TDC. It is extremely rare and you'll pay your left nut to have it overhauled IN DETROIT if anything ever goes wrong with it.
I have located a tranny out of a 91-92 lumina with the 3.4 DOHC for $200. I live in the Twin Cities and finding someone to rebuild a getrag on the side is not a problem.
I am trying to decide if I should jump on this tranny or buy a "possible" W41 tranny out of an SCX for $275. Maybe I should buy both, I am going to check on the SCX tranny tonight and see if it has the torsen diff.
If it has(crossing fingers) the Torsen diff, how many miles are they good for? I hear at 100,000 miles they are usualy junk, is this true?
Originally posted by Jimmy: I have located a tranny out of a 91-92 lumina with the 3.4 DOHC for $200. Jim
This transmission MUST be sent to GM to be rebuilt. No one else can do it. It will also cost ~$2000. It mounts differently that the Fiero transmissions, uses a pull-to-release clutch and a different shift linkage. If you must, use it, but you're better off with the normal Getrag.
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11:46 PM
Aug 6th, 2002
GTDude Member
Posts: 9056 From: Keysville, Virginia, USA Registered: Nov 2001
Originally posted by Will: This transmission MUST be sent to GM to be rebuilt. No one else can do it. It will also cost ~$2000. It mounts differently that the Fiero transmissions, uses a pull-to-release clutch and a different shift linkage. If you must, use it, but you're better off with the normal Getrag.
I've read about the pull and release setup, not something I would want. I never wanted to use the transaxle complete.
This sort of brings me back to my original question.
If one were to rebuild the Fiero getrag would any parts (differential, gears, ??) transplant from a 284 to a 282? I may be rebuilding a Getrag on the side and would take my sweet time completing it and collecting parts. Again I'm not interested in using the 284 just using parts of it if possible in my Fiero Getrag.
Jim
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09:43 AM
Will Member
Posts: 14226 From: Where you least expect me Registered: Jun 2000
DKOV claims to have had one of those transmissions rebuilt outside of Detroit. Since Getrag sells those parts only to GM, the only option would be 282 parts.
Inless the rebuilder had a source on the inside that snuck him some parts.
